| Patents for G11B 7 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor (102,715) |
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| 04/08/1980 | US4197011 Defect detection and plotting system |
| 04/08/1980 | CA1075359A1 Record player, in particular, a video player, for playing disc-shaped records provided with information tracks |
| 04/08/1980 | CA1075052A1 Straight-line optical scanner using rotating holograms |
| 03/25/1980 | US4195313 Antireflective information record having an optically passive transparent layer |
| 03/25/1980 | US4195312 Recorder and antireflective record blank having an optically passive transparent layer |
| 03/19/1980 | EP0008848A1 Apparatus for recording optical data onto a movable light-sensitive material, including an acousto-optic modulator |
| 03/18/1980 | CA1074005A1 Recording and playback system |
| 03/18/1980 | CA1073820A1 System for reducing noise transients in recorded sound signals |
| 03/11/1980 | US4193091 Optical videodisc read unit with tracking and focussing wobblers |
| 03/11/1980 | US4193090 Optical detection system for simultaneously interrogating a plurality of tracks |
| 03/11/1980 | CA1073255A1 Symmetrical astigmatic focus sensing system |
| 03/11/1980 | CA1073254A1 Optical reading device comprising a focussing detection device |
| 03/11/1980 | CA1073253A1 Optical focussing sensor |
| 03/05/1980 | EP0008543A1 Method for moulding a videodisc composition |
| 03/04/1980 | CA1073101A1 Optical focussing device for focussing a radiation beam |
| 03/04/1980 | CA1073100A2 Dynamic focussing of video disc objective lens |
| 03/04/1980 | CA1072797A1 Optical data record copier having array of lenses with field gaps aligned with data gaps |
| 02/26/1980 | US4190859 Tracking control apparatus for use in apparatus for reproducing video signals from a rotary recording medium |
| 02/26/1980 | US4190843 Recording methods for a multilayer optical record |
| 02/26/1980 | US4190775 Optical memory playback apparatus |
| 02/26/1980 | CA1072679A1 Apparatus for reading a flat record carrier with an optically readable information structure |
| 02/19/1980 | US4189783 Mass storage of books |
| 02/19/1980 | US4189746 Method and apparatus for determining focus conditions |
| 02/19/1980 | US4189735 Record playback apparatus and information record therefor |
| 02/19/1980 | US4189269 Workpiece transport device |
| 02/12/1980 | US4188433 Record carrier in disk form having cover layers |
| 02/12/1980 | CA1071768A2 Light beam path for reading video discs |
| 02/12/1980 | CA1071767A1 Video disc player for playing records of different thickness |
| 02/07/1980 | WO1980000200A1 Microfiche information and control system |
| 02/06/1980 | EP0007902A1 Automatic focusing system |
| 02/06/1980 | EP0007660A1 A microfiche information retrieval and control system utilizing machine readable microfiche and visually readable microfiche |
| 02/05/1980 | CA1071330A1 Optical focussing read-out device |
| 02/05/1980 | CA1070998A1 Electrodynamically controllable pivoting mirror device |
| 02/05/1980 | CA1070996A1 Holographic method of recording and reading secret information |
| 01/29/1980 | CA1070834A2 Video disc player |
| 01/29/1980 | CA1070833A1 Astigmatizer for laser recording and reproducing system |
| 01/29/1980 | CA1070832A1 Apparatus for reading a disc-shaped record carrier |
| 01/29/1980 | CA1070810A1 Optical projection device and an optical reader incorporating this device |
| 01/23/1980 | EP0007200A1 Method and apparatus for controlling the reading of information from an information storage medium |
| 01/23/1980 | EP0007199A1 Method and apparatus for information retrieval from an optically readable storage medium |
| 01/22/1980 | CA1070426A1 Focussing system for optical record carrier reader |
| 01/22/1980 | CA1070425A1 Reproducing apparatus with drop out suppression circuit |
| 01/22/1980 | CA1070261A1 Process for producing a stamper for videodisc purposes |
| 01/15/1980 | US4184055 Scanning system for reproduction of optical sound tracks with clear area noise discriminator delay means |
| 01/15/1980 | US4183627 Adjusting device for adjusting the position of an optical or opto-electronic component in two directions of adjustment which are perpendicular to each other |
| 01/15/1980 | CA1070014A1 Playback apparatus, in particular a video player |
| 01/15/1980 | CA1070011A1 Optically readable record carrier and playback system |
| 01/08/1980 | US4183094 Optical storage medium using the frequency domain |
| 01/08/1980 | US4183060 Capacitance distance sensor apparatus for video disc player/recorder |
| 01/01/1980 | CA1069215A Video disc beam tracking apparatus |
| 01/01/1980 | CA1069214A Videodisc mastering system |
| 12/25/1979 | US4180822 Optical scanner and recorder |
| 12/18/1979 | US4179708 Optical playback system having increased depth-of-field |
| 12/18/1979 | US4179532 Process for producing a disc-shaped information carrier which has information in the form of a beam-reflecting structure |
| 12/18/1979 | CA1068405A1 Dynamic light reference system for film reader |
| 12/18/1979 | CA1068404A1 Optical read-out system |
| 12/18/1979 | CA1068403A1 Optical read-out system for video disc |
| 12/11/1979 | CA1067999A1 Optical device for projecting a radiation beam onto a data carrier |
| 12/04/1979 | CA1067618A1 Apparatus for reading an optically readable reflecting information structure |
| 11/27/1979 | US4176377 Video disc configuration |
| 11/27/1979 | US4176277 Thermosensitive data-carrier designed for the recording of information and a method of recording information on such a data-carrier |
| 11/27/1979 | US4175832 Two-axis mirror control apparatus |
| 11/27/1979 | US4175823 Process for holographic recording of data in the form of electrical signals |
| 11/20/1979 | US4175145 Spreading a liquid polyurethane polymer on a substrate by spinning; curing layer |
| 11/20/1979 | CA1066801A1 Data carrier optically read out by transmission, and method of manufacturing said data carrier |
| 11/20/1979 | CA1066549A1 Method of optically producing a reproducible recording of video or other signals |
| 11/14/1979 | EP0005316A1 Optical apparatus and process for recording information and record carrier formed by this apparatus; optical apparatus for retrieving the recorded information |
| 11/13/1979 | CA1066414A2 Apparatus and method for storing information on a videodisc |
| 11/13/1979 | CA1066413A2 Video disc playback system |
| 11/13/1979 | CA1066412A2 Double mirror beam steering in video disc playback assembly |
| 11/13/1979 | CA1066411A1 Video disc and method of making the same |
| 11/06/1979 | CA1065983A1 Data carrier for optical read-out |
| 10/23/1979 | US4171879 Optical disc reader having diffraction minima at non-interrogated tracks |
| 10/23/1979 | CA1065059A1 Apparatus for optically reading a radiation-reflecting record carrier |
| 10/23/1979 | CA1065054A1 Optical focussing device |
| 10/17/1979 | EP0004738A1 Video disc player |
| 10/16/1979 | CA1064610A1 Record carrier for a television signal |
| 10/03/1979 | EP0004476A1 Time base error correction for optical disc players |
| 10/03/1979 | EP0004432A1 Optical storage system |
| 10/02/1979 | US4170022 Apparatus and process for recording with variable correction of a television signal having three components |
| 10/02/1979 | CA1063723A1 Device for writing and/or reproducing information in respectively from a rotating disk-shaped record carrier |
| 10/02/1979 | CA1063660A1 Hydrostatic bearing apparatus |
| 09/25/1979 | US4169227 System for detecting the tracking error in optical readers and recorders |
| 09/25/1979 | CA1063241A2 Carrier provided with a spiral structure in which sound and/or image information is stored |
| 09/04/1979 | US4167024 System for recording or reproduction of signals by means of polarized light beams |
| 09/04/1979 | CA1061901A1 Apparatus for recording and/or playing back signals on and/or from a record carrier contained in a cassette |
| 08/21/1979 | US4165519 Optical control system for read out from information recording medium |
| 08/21/1979 | CA1060917A1 Copy-proof multi-layer identification card |
| 08/14/1979 | US4164754 Method of manufacturing a die designed to duplicate a video frequency signal recording |
| 08/14/1979 | CA1060581A1 Self-compensating focus system for optical video playback device |
| 08/08/1979 | EP0003262A1 Medium, process and system for recording information |
| 08/07/1979 | US4163600 Light beam scanner |
| 08/07/1979 | US4163570 Optically coded document and method of making same |
| 07/31/1979 | US4163149 Automatic focusing apparatus |
| 07/31/1979 | CA1059620A1 Apparatus for reading a disk-shaped record carrier to be placed on a turntable |
| 07/31/1979 | CA1059601A1 Variable vergency focussing apparatus |
| 07/24/1979 | US4162398 Bias control circuit for light modulators |
| 07/24/1979 | CA1059229A1 Visual image recording device |
| 07/17/1979 | US4161753 Video recording disk with interlacing of data for frames on the same track |
| 07/17/1979 | US4161752 High density video disk having two pit depths |